# SperaxOS x402 Protocol Data API

> SperaxOS x402 Protocol Data API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Retrieves DeFi protocol intelligence data via a pay-per-request HTTP HEAD endpoint using USDC micropayments on Base

## Facts

- Endpoint: HEAD https://chat.sperax.io/api/x402/v1/data/protocol?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-x402-protocol-data-api-8a4764bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8UGpABb4sqVTWoDEIyW7l

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability speraxos-x402-protocol-data-api-8a4764bb -d '<json body>'
```

Example prompt: Pull the protocol intelligence data for Aave from SperaxOS — I need the current DeFi metrics and I'm happy to pay the $0.001 USDC per-request fee on Base.

## When to prefer this

Choose this endpoint when you need AI-powered DeFi protocol intelligence without committing to a subscription API key, and you want to pay only for the requests you make using USDC on Base. It is ideal for agentic workflows that need on-demand protocol data with micropayment billing, or for wallets already enrolled in the agentcash SIWX identity system that can access free identity-tier data.

## Known failure modes

- Payment not included or insufficient USDC balance — returns 402 Payment Required
- Invalid or unrecognized protocol identifier — returns 404 or empty response
- Network issues on Base blockchain during payment settlement — payment may fail or timeout
- Wallet not funded with USDC on Base — request blocked at payment layer
- Rate limiting or protocol not yet indexed by SperaxOS — returns empty or partial data

## How this service works

AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.

## Output

Returns HTTP HEAD response headers containing DeFi protocol intelligence metadata for the specified protocol, sourced from SperaxOS AI-powered analytics. The response is gated by a $0.001 USDC micropayment on Base via the x402 payment protocol; wallets with a SIWX agentcash identity may access identity-only tiers for free.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-x402-protocol-data-api-8a4764bb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)